need help regarding which graphic card for premiere pro cc 2017?

Don't buy the GT 710 at all. It has only 192 CUDA cores and extremely poor memory throughput, and not only is it sluggish itself, but it also slows down CPU performance even in applications that doesn't use the GPU. In fact, its performance is so sluggish (effectively degrading the i5's CPU performance down to the level of an 11-year-old Core 2 Quad CPU) that you might as well stick with the integrated Intel HD Graphics 630 that's on that 7th-Generation Intel i5 CPU.

In other words, the GT 710 is a complete waste of money if you're buying it for any modern CPU platform because it results in a severely lopsided CPU/GPU performance balance in favor of the CPU, even if your system has a newer-generation dual-core CPU such as a Pentium G4560. And PC configurations that are severely CPU-heavy (relative to the GPU) are equally as detrimental to the overall PC experience as configurations that are severely CPU-light. It is very much like trying to ride a bicycle with both of its wheels shaped in a severely elongated diamond.

As for the GTX 1050, I really cannot suggest that card at this time, especially with the discrete GPU prices as insanely high as they currently are. If that level of GPU-accelerated performance is what you're after, then you might as well hold off on a PC purchase until GPU prices have come back down to sane levels, especially if you're very uncomfortable opening up and going inside a PC case to install an upgraded component. Otherwise, if you really need a new PC immediately, then simply purchase that PC as configured, without the discrete GPU, and simply use integrated graphics. But if the builder that you're buying from insists on including or is required to include a discrete GPU, and that builder charges you extra money for even a low-budget GPU, then I would look for another system builder/reseller at that point. This is because the GTX 1050 is really the minimum GPU that's required to provide even a modest level of GPU-accelerated performance without harming the CPU-only performance too much, and there is nowadays almost nothing in between the integrated on-CPU Intel graphics and the GTX 1050 that's worthwhile.